Possible Clues:

• 'They only sound sore, but you can easily see through them (5)'
• Glass sheets in windows
• Glass sheets
• Sheets in frames
• See-through sheets
• Window shopper's buys?
• They sound like see-through 3 downs
• 'See through the agony of them, by the sound of them (5)'
• Clear squares
• They may sound sore, but it's easy to see through that